Hitachi WJ200-001S Quick Reference Manual page 50

The [AM] signal offset and gain are adjustable, as indicated below.
Func.

[AM] output gain

[AM] output offset
The graph below shows the effect of the gain and offset setting. To calibrate the [AM]
output for your application (analog meter), follow the steps below:
1. Run the motor at the full scale speed, or most common operating speed.
a. If the analog meter represents output frequency, adjust offset () first, and then

use
b. If [AM] represents motor current, adjust offset () first, and then use
the voltage for full scale output. Remember to leave room at the upper end of the
range for increased current when the motor is under heavier loads.
AM output offset adjustment
AM output
10V
=0~10
5V
0
NOTE: As mentioned above, first adjust the offset, and then adjust the gain. Otherwise the
required performance cannot be obtained because of the parallel movement of the offset
adjustment.
Description
to set the voltage for full scale output.
Parallel
movement
Full scale (FS)
1/2 FS
Hz or A
Range Default
0.~255. 100.
0.0~10.0 0.0
AM output gain adjustment
AM output
10V
5V
0
48

=0~255
Full scale (FS)
1/2 FS
Hz or A
to set